Kate Walsh, the captain of Great Britain's field hockey team, underwent successful surgery for a fractured jaw on Monday.
Walsh suffered the injury when she was accidentally hit by a stick during the host's 4-0 win over Japan on Sunday. The injury forced her out at the 66th minute of the match and she was immediately taken to the hospital for assessment.
The 32-year-old's status for the rest of the London Games will be assessed over the next coming days, though it is highly doubtful she will be ready for Tuesday's Pool A match with Korea.
Helen Richardson will serve as captain during Walsh's absence.